Thank you for mBlock for Linux The installation on Ubuntu 16.04 + MATE perfect, the USB connection with Arduino UNO, without problems, uploading the program by "Upload firmware" was not possible Any ideas?

Download the React DevTools for a better development experience: https://fb.me/react-devtoolsWarning: Accessing PropTypes via the main React package is deprecated. Use the prop-types package from npm instead.Warning: SerialConnect: React.createClass is deprecated and will be removed in version 16. Use plain JavaScript classes instead. If you're not yet ready to migrate, create-react-class is available on npm as a drop-in replacement.is Dialog : undefinedis Dialog : undefinedis Dialog : undefinedstate.project: Objectstate.project: ObjectFailed to load resource: the server responded with a status of 404 (Not Found)